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Optical phonon properties of MgxZn1-xO thin film alloys.

MgxZn1-xO thin film alloys with the Mg composition ranges from x=0 to x=0.78 were synthesized via reactive magnetron sputtering. Phase segregation occurs due to structural differences of the end members. Selective resonant Raman scattering was utilized to investigate the phase segregation range; 3.8 eV laser excitation detects an embedded Zn-rich hexagonal structure while 5.1 eV laser excitation detects an embedded Mg-rich defective cubic structure. The nature of the structural disorder in the alloys was studied via Urbach energy, obtained from optical absorption, and Raman spectral line broadening. The alloying compositional fluctuation was found to be the dominating mechanism of the structural disorder for MgxZn1-xO alloys at the phase segregation range.

Hui Che (G), University of Idaho

Jesse Huso, University of Idaho

Dinesh Thapa, University of Idaho

John Morrison, Lewis and Clark State College

Leah Bergman, University of Idaho

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Title Annotation:56TH ANNUAL SYMPOSIUM OF THE IDAHO ACADEMY OF SCIENCE: THEME: ENERGY, MATERIALS, AND NANOTECHNOLOGY
Author:Che, Hui "G"; Huso, Jesse; Thapa, Dinesh; Morrison, John; Bergman, Leah
Publication:Journal of the Idaho Academy of Science
Date:Dec 1, 2014
Words:143
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